They are: construction and other outdoor work; factories, plants and warehouses; labs and research facilities; offices and contact centres; other people's homes; restaurants offering takeaways or deliveries; shops and branches; and vehicles.

The government says it has five key points for businesses to implement "as soon as it is practical":

Work from home if you can - the government says its "message is clear" that people who cannot work from home, and whose workplace has not been told to close, should go to work

Carry out a COVID-19 risk assessment, in consultation with workers or trade unions - the government says employers should publish the results of their risk assessments on their website if possible, and it expects all businesses with more than 50 employees to do so

Maintain two-metres social distancing wherever possible - employers should re-design workspaces, stagger start times, create one way walkthroughs, open more entrances and exits, or change seating layouts in break rooms

Manage transmission risk where people cannot keep two-metres apart - employers should look into putting barriers in shared spaces, creating shift patterns minimising the number of people in contact with one another, or ensuring colleagues are facing away from each other

Reinforcing cleaning processes - workplaces should be cleaned more frequently and close attention should be paid to high-contact objects like door handles and keyboards. Employers should provide hand-washing facilities or hand sanitisers at entry and exit points

Ministers have issued travel safety advice for walking, cycling, using private cars and vans, taxis and public transport - although the public has been urged to avoid the latter where possible.

People who shouldn't travel include anyone experiencing coronavirus symptoms, people self-isolating due to sharing a house with somebody with symptoms, and people who are clinically extremely vulnerable.

Walking and cycling

The government says "where possible" pedestrians and cyclists should:

Try to maintain social distancing of two metres from others

Wash your hands for at least 20 seconds or sanitise your hands before and after cycling

Travel at off-peak times if they can and ask employers to agree alternative or flexible working hours

Book travel online or consider using contactless payment to buy tickets

Wear a face covering on public transport if possible, although the government has stressed this is optional and not required by law. It has also insisted surgical masks or respirators should be reserved for frontline health and care workers, and issued guidance on how people can make face coverings

Avoid physical contact and try to face away from other people in situations where social distancing is not possible

Be careful not to touch your face, and cover you mouth and nose with a tissue or elbow when coughing or sneezing

Avoid consuming food and drink on public transport where possible

Wash your hands for at least 20 seconds or sanitise your hands after the journey

Tube packed day after PM's speech

Taxis and private hire vehicles

The government's advice is broadly the same as that for public transport, but it adds that passengers should follow the advice of the driver, such as being asked to sit in the back left hand seat if travelling alone.

Private cars and vans

The government says that people who have to travel in private vehicles with others from outside their household group should share the transport with the same people each time and keep to small groups.

It advises:

Wear a face covering if in contact with people you do not normally meet

Keep two-metres away from cyclists at traffic lights

Limit the time spent at garages, petrol stations and motorway services and pay by contactless

If people from different households use a vehicle, clean it between journeys, particularly door handles, the steering wheel and other areas that people may touch

Keeping the car windows open to allow good ventilation and face away from each other

Consider seating arrangements to optimise distance between people in the vehicle

Wash hands for at least 20 seconds or sanitise hands when arriving and leaving

Image:Traffic on the A1203 in London on Monday morning following the PM's speech

Aviation, ferries and maritime transport

The government's advice for travelling on planes or ferries includes avoiding physical contact and try to face away from others.

It adds:

Be careful not to touch your face and cover your mouth and nose with a tissue or your elbow when coughing or sneezing

Wear a face covering if you can

Follow instructions from the transport operator which may include notices about which seats to use or how to queue; additional screens, barriers or floor markings and requests to board through different doors or to move to less busy areas

Do not congregate near entrances or exits while waiting

Wash your hands for at least 20 seconds or sanitise your hands as soon as possible

Shops

The government is now advising people to wear face coverings in shops where social distancing is not possible.

It has also issued guidance to retailers that are currently open, such as chemists and shops selling food, as well as others which are still closed.